If I have seen further it is by standing on the shoulders of giants.

Isaac Newton

Somewhere, something incredible is waiting to be known.

Carl Sagan

The important thing is not to stop questioning.

Albert Einstein

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.

Albert Einstein

Success is the sum of small efforts, repeated day in and day out.

Robert Collier

Start where you are. Use what you have. Do what you can.

Arthur Ashe

Life must be understood backward. But it must be lived forward.

Soren Kierkegaard

The happiness of your life depends upon the quality of your thoughts.

Marcus Aurelius

You have power over your mind, not outside events. Realize this, and you will find strength.

Marcus Aurelius

We suffer more often in imagination than in reality.

Seneca